665363160 has 576 divisors, whose sum is σ = 2868203520. Its totient is φ = 137168640.

The previous prime is 665363143. The next prime is 665363189. The reversal of 665363160 is 61363566.

It is a happy number.

665363160 is a `hidden beast` number, since 66 + 536 + 3 + 1 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5239017 + ... + 5239143.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520).

Almost surely, 2^665363160 is an apocalyptic number.

665363160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665363160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434101760).

665363160 is an abundant number, since it is smaller than the sum of its proper divisors (2202840360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665363160 is a wasteful number, since it uses less digits than its factorization.

665363160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 665363160 is about 25794.6343257663. The cubic root of 665363160 is about 873.0107342712.

It can be divided in two parts, 66536 and 3160, that added together give a palindrome (69696).

The spelling of 665363160 in words is "six hundred sixty-five million, three hundred sixty-three thousand, one hundred sixty".